2012/6/6 Doug Jolley <lists / ruby-forum.com>:
>
>  @@myClassVar.capture=('myKey','myValue')


Methods ending with = can usually only take one argument  as you
experienced, two arguments are not supported by the parser.

(Except for []= methods, which takes two arguments, or using some ugly
tricks, which you don't want to use anyway.)

-- Matma Rex